hisenclevee



(No Model.)

F. A. HASENGLEVER.

METHOD OF MAKING HEXAGONAL NUTS. No; 306,611. Patented Oct. 14, 1884.;

a bar and forced into a matrix, in which it is UNiTE STATES i PAl lhNlhOitmcso TO THE PATENT NUT AND BOLT COMPANY,

\VORKS, ENGLAND.

LIMITED, OF LONDON METHOD OF MAKING HEXAGONAL NUTS.

SPECIFICATION forming part of Letters Patent No. 306,611, dated October 14', 1884.

Application filed may 20, 1884. (No model.) Patented in Germany October 21, 1881, No. 21,528.

To (025 whom it may concern Be it known that I, FRIEDRICH ALBERT HASENCLEVER, a citizen of the United States, residing at Dusseldorf, in the Empire of Ger- 5 many, have invented a new and useful Improvement in the Manufacture of Blanks for Hexagonal Nuts, (for which I have obtained a patent in Germany, dated October 21, 1881, No. 21,528,) of which the following is a speci- IO fication.

In machines for forging the blanks that have to be lapped, so as to form nuts for screw-bolts, the piece [of metal that is to constitute the blank is usually cut by a punch off the end of punched with a round hole, compressed and shaped to the form of the matrix. \Vhen the nuts are to be hexagonal, there is considerable waste of metal in cutting them from a straight 2o rectangular bar, as angular pieces of the metal have to be removed in order to bring the blank to the hexagonal shape. Attempts have been made to avoid this waste by indenting the edges ofthe bar so that it presents hollows be- 2 5 tween the successive hexagons, but it has been found difficult to make the bar thus indented gage accurately with the spacing determined by the matrix. My invention relates to a method of presenting the bar to the cutting-punch and matrix and determining its position when out in such a manner that there is no waste of metal and no difficulty in setting it to proper gage, as I will explain, referring to the accompanying drawing, which shows a hexagonal matrix with the barplaced over it against the gages, by which its position is determined.

On the block A, which contains the hexagonal matrix B, are fixed two gages, the flat end gage, 0, against which the end of the bar is pressed, and the pointed side gage, D,against which the side of the bar is pressed. Each of these gages is secured to the block A by a bolt or screw passing through a slotted hole. The 4 5 gage O is set so that its face coincides with one of the sides of the hexagon. The gage D is set so that one of its sloping sides coincides with a side of the hexagon, its point being at the adjacent angle of the hexagon. The bar E is selected of breadth equal to the length of a side of the hexagon, and of such depth as to give metal enough to fill out the hexagon to the depth of the required blank. The bar being placed against the gages, as shown, the punch cuts from its end a rectangular piece without any waste, and this piece, when forced down in the matrix against the opposite bolster and punched through with a round hole, is spread out, molded, and compressed, so as to take the shape of the'matrix.

It will be seen that in my invention a metal bar of rectangular form is first produced, having the width of its face exactly equal to the side of the hexagon, and having a depth or thickness sufficient to fill up the die, when it is centrally punched and compressed in the die, whereby rectangular pieces can be cut from the bar with no waste of metal, and requiring but little cutting to sever them from the bar. This has been found of great advan- 7o tage and usefulness, in that I avoid first in1- parting to the metal bar a peculiar shape such as indenting the sides, as heretofore stated-while I avoid waste of metal throughout the operation. a

I am aware that nuts have been cut from variously-shaped metal bars-as, for example, in Patent No. 180,285, where abaris produced the cross-section of which is a polygon of the form of the nut to be produced, the nut-blanks of the requisite length being cutoff and fed to a closed die-box to punch the eye and compact the nut.

' I am also aware that a heated bar from which blanks have to be made has been adjusted against a stop-block on a die-box, a die moving forward to sever a portion of the bar and force the severed piece into the die and against a counter-die and punch to centrally indent the blank, after which the nut is removed and in a cold condition subjected to an ordinary punching-machine, the punch of which has a larger diameter than the aforesaid indentation to complete and shave the eye, as in Patent No. 97,901. Such, however, do not 9 5 constitute my invention, and are not claimed.

forcing the said piece into the die and punching the complete eye, and unilbrlnly spreading the metal to iill the die, substantially as set forth.

In testimony whereof Ihave signed my name to this specification, in the presence ol'two subscribing witnesses, this 2d day of May, A. .l). 1884-.

. FRIEDRICH Ahlll lli'l llASllNCllllYllR.

\Vitnesses:

OLIVER IMRAY, DANIEL Roonns. 

